Mary didn't come to my party. I think she ______ busy., should have been, might have been, must have been, Ahmed got 100% on the test. He ______ studied very hard., could have, should have, must have, I didn't see Sara at school yesterday. She ______ been sick., can't have, may have, should have, You failed the test because you didn't study. You ______ studied more., might have, may have, should have, I can't find my keys. I ______ left them at home., should have, might have, can't have, Ali wasn't at home last night. He ______ gone to the cinema., could have, must have, should have, She arrived at 7:00, but the movie started at 6:30. She ______ missed the beginning., should have, may have, must have, Tom didn't answer his phone. He ______ been sleeping., can't have, might have, should have, You forgot to call your mother yesterday. You ______ called her., could have, may have, should have, Jack was with me all evening. He ______ stolen the money., must have, can't have, should have, The lights were off when I arrived at Tom's house, and his car wasn't outside. He ______ gone out with his friends., must have, should have, may have, David was at the restaurant with me from 7:00 to 9:00 last night. He ______ taken the money from the office at 8:00., should have, can't have, must have, Lina left her house late and missed the bus. She arrived at school 30 minutes late. She ______ left home earlier., should have, must have, may have, Omar didn't come to work this morning. His phone is turned off, and nobody can contact him. He ______ been sick., should have, can't have, might have, Sarah studied every night for two weeks before the final exam. She ______ studied very hard., might have, must have, should have, I don't know where John was yesterday. He ______ gone to the library., can't have, should have, may have, We arrived late, so we ______ taken a taxi., may have, should have, must have, She didn't study, but she got a good grade. She ______ been lucky., should have, might have, can't have, The ground is wet, and it was cloudy last night. It ______ rained., can't have, should have, must have, I didn't know you needed help. I ______ helped you if you had asked me., could have, should have, must have

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